CN201575451U - Cyclone coal economizer - Google Patents
Cyclone coal economizer Download PDFInfo
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- CN201575451U CN201575451U CN200920288193XU CN200920288193U CN201575451U CN 201575451 U CN201575451 U CN 201575451U CN 200920288193X U CN200920288193X U CN 200920288193XU CN 200920288193 U CN200920288193 U CN 200920288193U CN 201575451 U CN201575451 U CN 201575451U
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- flue
- casing
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- eddy flow
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Abstract
The utility model provides a cyclone coal economizer, including a casing, a water outlet arranged on the upper end of the front part of the casing, a water inlet arranged on the lower end of the back part of the casing, and an air flue arranged on the back of the casing. The cyclone coal economizer is characterized in that it also includes a smoke/dust separation tube packaged in the casing, one end of the smoke/dust separation tube nearby the water outlet is provided with a flow guiding piece, one end of the smoke/dust separation tube nearby the air flue is provided with an exhaust tube; a baffle is arranged between the casing and the air flue; water-stop sheets are arranged on the external side of the smoke/dust separation tube and the internal side of the casing. The cyclone heat-transfer coal economizer is characterized in that the smoke brings suspended particles to form a mandatory rotary flow, such that it is possible to reduce contact of flyash and metal tube wall, improve thermal coefficient of the metal tube wall, avoid low-temperature corrosion of the tube wall, and improve heat transfer coefficient by changing the flowing structure of the fluid.
Description
One, technical field: the present invention relates to the energy-saving and emission-reduction field of boiler, specifically refer to the device that the tail flue gas waste heat of boiler is recycled.
Two, background technology: China's Eleventh-Five Year Plan point out " that energy industry will adhere to saving is preferential, base on our country, coal for basis, diverse development, construct energy supply system stable, economic, that clean "; " on the basis of optimizing structure, increasing the benefit and cutting down the consumption of energy, realize that domestic total output value per capita in 2010 doubled than 2000; The level of resources utilization significantly improves, and unit GDP energy resource consumption reduces about 20% than ' 15 ' end of term ".Simultaneously, in the ten big emphasis energy conservation projects that National Development and Reform Committee starts, also the coal-burned industrial boiler transformation is listed in wherein.
In people's daily productive life process, boiler is main power-equipment.The steam that Industrial Boiler is produced directly need be used for industrial production, and the hot water of production also can heat.Industrial Boiler quantity is big, distribution is wide, and annual Coal-fired capacity is approximately greater than 1/4th of national coal production.Therefore, raise the efficiency, reducing boiler heat loss will be the great research topic in industry boiler energy-conservation consumption reduction field.
At present, traditional recovery boiler fume afterheat reduces the measure of exhaust gas temperature, mainly is at exhanst gas outlet economizer to be installed.Economizer is a kind of heat-exchange apparatus that absorbs the smoke discharging residual heat heated feed water.It can improve feed temperature, reduces exhaust gas temperature, reduces heat loss, improves boiler efficiency, correspondingly fuel saving.Reduce exhaust gas temperature, common way is to increase the boiler tail convection heating surface, is to install flue gas additional laterally or the heating surface of parallel baffled on boiler.Because heat transfer coefficient is little, need to arrange a lot of pipes, could reduce to 150 ℃ to flue-gas temperature from 185-195 ℃.But, because being turbulent condition in pipeline, flue gas flows, the smoke pipe inwall is easy to accumulate black dirt etc., influences heat-transfer effect; And when flue gas and water heat exchange, make temperature reduce to 140 ℃ of dew points when following, understand residual water vapor in the flue gas,, metal pipe-wall is caused corrosion with reaction of Salmon-Saxl generation sulfide.
Three, summary of the invention:
1, goal of the invention: the utility model provides a kind of eddy flow economizer, and purpose is to improve the thermal conductivity factor of metal smoke pipe wall, avoids the tube wall cold end corrosion simultaneously.
2, technical scheme: the utility model is implemented by the following technical programs:
A kind of eddy flow economizer, comprise and be cylindrical shell, be installed in the delivery port of shell nock, be installed in the water inlet of lower end, shell rear portion, and the flue that is installed in the shell rear portion, it is characterized in that: described eddy flow economizer also comprises parcel flue dust separator tube in the enclosure, is positioned at delivery port one end at the flue dust separator tube conducting element that has flow deflector is installed, be positioned at flue one end at the flue dust separator tube blast pipe is installed, blast pipe communicates with flue; Between shell and flue, baffle plate is installed; In the flue dust separator tube outside, shell installed inside water-stop sheet is arranged.
Conducting element is centrum, and the end that area is big is connected with the flue dust separator tube.
The flow deflector number of conducting element is more than or equal to 4.
The water-stop sheet number is more than or equal to 2.
Water inlet and delivery port are symmetrical up and down along the footpath of shell.
The flue dust separator tube has 3, and the center of circle, cross section with shell on the cross section of shell is that the center evenly distributes.
3, advantage and effect: the characteristics of eddy flow heat transfer type economizer described in the utility model are that flue gas drive suspended particulate forms mandatory rotational flow, having reduced flying dust contacts with metal pipe-wall, the one, avoid the tube wall dust stratification, change the economizer physical property, improved the thermal conductivity factor of metal smoke pipe wall.The 2nd, suppressed sulfide and contacted with metal pipe-wall and produce chemical reaction, avoided the tube wall cold end corrosion, the 3rd, flue gas has become eddy flow by original Turbulence Flow and has flowed, not only wash away and destroy fluid boundary layer, make the fluid velocity of wall to increase, and changed the fluidal texture of fluid, improved heat transfer coefficient.
Four, description of drawings:
Fig. 1 is the structural representation of eddy flow economizer described in the utility model;
Fig. 2 is the A-A generalized section of eddy flow economizer described in the utility model.
Five, the specific embodiment:
The utility model provides a kind of technical scheme, being about to the eddy flow heat transfer technology is applied on the economizer, this eddy flow heat transfer type economizer is divided into two flow processs of cigarette G﹠W, flows the flue dust separator tube flows outside of water in economizer in the flue dust separator tube of flue gas in economizer; In the economizer, flue dust separator tube front end is equipped with conducting element, and the flue dust separator tube outside is provided with water-stop sheet.When flue gas changes original Turbulence Flow state during by conducting element, form and force swirling eddy, the flying dust brute force that flue gas is driven in the flue dust separator tube is rotated the metal inner surface that washes away the flue dust separator tube, make not dust stratification of inside pipe wall, contamination by dust reduces, and heat transfer coefficient improves, and feedwater is then flowed along the direction of water-stop sheet water conservancy diversion, the outer wall that washes away the flue gas separator tube reduces the cigarette temperature, improves the feed temperature of boiler.
The eddy flow augmentation of heat transfer is by forming non-stationary flow and secondary stream reaches augmentation of heat transfer with micelle mixing and attenuate boundary layer in the strengthening fluid purpose effectively.The eddy flow heat transfer is not only washed away and is destroyed fluid boundary layer, makes the fluid velocity of wall to increase, and has changed the fluidal texture of fluid.Except that the axial flow velocity component, also has bigger tangential flow velocity component, tangential velocity makes the motion of runner inner fluid particle be subjected to action of centrifugal force, stiffened edge interlayer flow disturbance and pulsation, thereby eddy flow is strengthened diabatic process, relatively large in eddy flow situation lower wall surface aggregate velocity, the thickness in boundary layer is also thinner relatively, thereby has improved heat transfer coefficient.
Below in conjunction with accompanying drawing the utility model is specifically described:
Fig. 1 is the structural representation of eddy flow economizer described in the utility model, Fig. 2 is the A-A generalized section of eddy flow economizer described in the utility model, wherein 1 is delivery port, and 2 is conducting element, and 3 is the flue dust separator tube, 4 is blast pipe, 5 is baffle plate, and 6 is water-stop sheet, and 7 is water inlet, 8 is flue, and 9 is shell.
Be positioned at delivery port 1 one ends at flue dust separator tube 3 conducting element 2 is installed, conducting element 2 is centrum, and the end that area is big is connected with flue dust separator tube 3, and the flow deflector number of conducting element 2 is 4; Be positioned at flue 8 one ends at flue dust separator tube 3 blast pipe 4 is installed; Between shell 9 and flue 8, baffle plate 5 is installed; In flue dust separator tube 3 outsides, shell 9 installed inside have 2 water-stop sheets 6.
The characteristics of this eddy flow heat transfer type economizer are that flue gas drive suspended particulate forms mandatory rotational flow, having reduced flying dust contacts with the metal pipe-wall of flue dust separator tube, the one, avoid the tube wall dust stratification, changed the economizer physical property, improved the thermal conductivity factor of metal smoke pipe wall.The 2nd, suppressed sulfide and contacted with metal pipe-wall and produce chemical reaction, avoided the tube wall cold end corrosion, the 3rd, flue gas has become eddy flow by original Turbulence Flow and has flowed, not only wash away and destroy fluid boundary layer, make the fluid velocity of wall to increase, and changed the fluidal texture of fluid, improved heat transfer coefficient.
Below by experiment effect of the present utility model is specifically described:
Test one: the heat transfer test of eddy flow flue gas
| |
4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 |
| K | 55 | 58 | 66 | 75 | 79 | 85 | 90 | 98 | 105 | 95 | 80 |
Last table is the result of the test of velocity of flue gas when 6m/s:
N-conducting element sheet number.
The K-heat transfer coefficient, the W/m2 of unit ℃.
Test two: the heat transfer contrast test (flow velocity equates) under Turbulence Flow and the eddy flow flow regime
300 millimeters of diameters are selected in test, long 12 meters steel pipe flue.
Test method: test the temperature value under Turbulence Flow, the eddy flow flow regime at inlet, outlet two ends respectively.Can see from test data and compare traditional economizer, the outlet water temperature of spiral-flow type economizer is starkly lower than traditional economizer exit water temperature, and this just illustrates that its heat exchange effect is better than traditional economizer.Because eddy flow flows than the long flow path of Turbulence Flow, can destroy fluid boundary layer, change the fluidal texture of fluid, stiffened edge interlayer flow disturbance washes away tube wall, so the convection heat transfer' heat-transfer by convection ability that eddy flow flows is better than Turbulence Flow.
Test three: the wear test of swirl-flow devices
Last table is for selecting Q235A common material conducting element, the test data of using for use on reciprocating-grate boiler.If when chain-grate boiler is used, wearing and tearing can minimizing 30%, if conducting element material selection wear-resistant metal material or take the abrasionproof measure, the rate of wear can reduce greatly.
In the table:
The M-swirl vane degree of wear, the unit millimeter
The N-number of degrees.
Test four: the heat conductivility test of black dirt
Numerical value is the inside and outside wall temperature difference in the table.
At the boiler operatiopn scene flue inside and outside wall is carried out temperature test (test flue-gas temperature and smoke pipe outside wall temperature).As above shown in the table, flue-gas temperature is low more, and thermal resistance is big more.Therefore can embody the meaning of scale removal more.
Claims (6)
1. eddy flow economizer, comprise and be cylindrical shell (9), be installed in the delivery port (1) of shell (9) nock, be installed in the water inlet (7) of shell (9) lower end, rear portion, and the flue (8) that is installed in shell (9) rear portion, it is characterized in that: described eddy flow economizer also comprises the flue dust separator tube (3) that is wrapped in the shell (9), be positioned at delivery port (1) one end at flue dust separator tube (3) conducting element (2) that has flow deflector is installed, be positioned at flue (8) one ends at flue dust separator tube (3) blast pipe (4) is installed, blast pipe (4) communicates with flue (8); Between shell (9) and flue (8), baffle plate (5) is installed; In flue dust separator tube (3) outside, shell (9) installed inside water-stop sheet (6) is arranged.
2. according to the described a kind of eddy flow economizer of claim 1, it is characterized in that: conducting element (2) is centrum, and the end that area is big is connected with flue dust separator tube (3).
3. according to the described a kind of eddy flow economizer of claim 1, it is characterized in that: the flow deflector number of conducting element (2) is more than or equal to 4.
4. according to the described a kind of eddy flow economizer of claim 1, it is characterized in that: water-stop sheet (6) number is more than or equal to 2.
5. according to the described a kind of eddy flow economizer of claim 1, it is characterized in that: water inlet (1) is symmetrical up and down along the footpath of shell (9) with delivery port (7).
6. according to claim 1,2 described a kind of eddy flow economizers, it is characterized in that: flue dust separator tube (3) has 3, and the center of circle, cross section with shell (9) on the cross section of shell (9) is that the center evenly distributes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920288193XU CN201575451U (en) | 2009-12-18 | 2009-12-18 | Cyclone coal economizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920288193XU CN201575451U (en) | 2009-12-18 | 2009-12-18 | Cyclone coal economizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201575451U true CN201575451U (en) | 2010-09-08 |
Family
ID=42695328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920288193XU Expired - Fee Related CN201575451U (en) | 2009-12-18 | 2009-12-18 | Cyclone coal economizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201575451U (en) |
-
2009
- 2009-12-18 CN CN200920288193XU patent/CN201575451U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100908 Termination date: 20101218 |